IME- Betta are more aggressive toward their own species-usually its the other species that end up fin nipping the Betta more than the Betta being problematic.....Sometimes in smaller tanks the Betta can corner slower moving or weaker fish-often the Betta gets blamed for killing other fish-but usually it was due to the fish being dead and/or missing for other reasons and the Betta was seen picking at the already dead body....and gets the wrap for killing it...that said, I have had some Bettas more female than long heavy fin males that would hunt other species down and actively kill them too.....
New born fry of the Platy would be at risk......but usually once the fry are too big to fit in their mouth the male Bettas will usually leave them alone-they are usually too slow to catch them....but not the females.....lol.....
New born fry of the Platy would be at risk......but usually once the fry are too big to fit in their mouth the male Bettas will usually leave them alone-they are usually too slow to catch them....but not the females.....lol.....
